81045846 has 64 divisors (see below), whose sum is σ = 208450560. Its totient is φ = 23147208.

The previous prime is 81045793. The next prime is 81045857. The reversal of 81045846 is 64854018.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 81045846.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29295 + ... + 31941.

It is an arithmetic number, because the mean of its divisors is an integer number (3257040).

Almost surely, 2^81045846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81045846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104225280).

81045846 is an abundant number, since it is smaller than the sum of its proper divisors (127404714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81045846 is an equidigital number, since it uses as much as digits as its factorization.

81045846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677 (or 2659 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 81045846 is about 9002.5466397015. The cubic root of 81045846 is about 432.7564870216.

It can be divided in two parts, 810 and 45846, that added together give a 6-th power (46656 = 6⁶).

The spelling of 81045846 in words is "eighty-one million, forty-five thousand, eight hundred forty-six".